The title is super clickbaity, emails are likely compromised?? Uh no. Every single closed source client for end to end encrypted messaging has this problem.

What happens if whatsapp decides to exfiltrate your end to end encrypted messages from the client side app?? There is nothing you can do to stop them. They can even attach it to an analytics event to be discrete.

Protonmail is unable to view your emails without your password and that claim is true regardless of whether they hold your encrypted private key server side.

Total garbage